My black mystery snail has started to climb to the top of the tank and hang upside down from the lid. I’m not sure why. I have it in a 10 gallon tank with a guppy and a gold mystery snail. Neither of them are acting out of the ordinary so I don’t think it’s the water. I clean the tank once a week or twice if it needs it. I’m not sure if it’s a male or female but a clutch was laid a couple of days ago (don’t know if that’s related or not) but it started afterwards.